Eric Blossom wrote: > On Tue, Feb 20, 2007 at 03:41:31PM +0100, anmar wrote: >> hi all, >> >> we have been searching for a way to transmit two independent signals one >> on TxA and the other on TxB. > > Using two daughterboards, you can send different complex baseband > signals out the A side d'board and the B side d'board. You must set > nchan=2 in the usrp.sink_c constructor, and provide an interleaved > stream of complexes. (Yes, the interface is a bit strange and ought > to be revisited/fixed.) You can create the interleaved output stream > using > > u = usrp.sink_c(nchan=2, interp_rate=<interp>) > > src0 = <first complex source> > src1 = <second complex source> > interleaver = gr.interleave(gr.sizeof_gr_complex) > fg.connect(src0, (interleaver, 0)) > fg.connect(src1, (interleaver, 1)) > fg.connect(interleaver, u) > > r0 = u.tune(0, u.db[0][0], freq_0) # set center freq on side A > d'board > r1 = u.tune(1, u.db[1][0], freq_1) # set center freq on side B > d'board > > >> we have read the Tx_MUX documentation and tried some settings but we >> only could send two different frequencies two only 80khz!!! and we >> always have had two signals! >> what we like to do is is to chose the "two independent real signal" mode >> on the AD9862, how can we do that, just change the AD9862.h, or some >> different approach? if yes how to load it to the USRP. >> reading some of the forum questions, we understand that the gnuradio >> have the "Dual channel complex" mode and changing it would give >> conflicts with the FPGA and the software. >
Hi Eric, thanks for your answer, > That's right. If you're using a single Basic Tx daughterboard, and > you want independent real output out the I and Q, that'll take a fair > amount of hacking. Using two daughterboards is going to be much, much > easier ;) ok that is to bad, but do you know any one how tried to do this, or do you know where to begin hacking :)? We just want to see if it can be done with the time that we have, or just go and use two Tx daugterboards. thanks -- Posted via http://www.ruby-forum.com/. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio